import Vue from 'vue'
import Router from 'vue-router'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/users/Users.vue'
//引入组件
import Login from '../components/Login'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import GoodsList from '../components/goods/List.vue'
import GoodsAdd from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'
Vue.use(Router)

const router = new Router({
  routes:[
    // 使用重定向。当登录时自动重定向到登录页面
    {
      path:'/',
      redirect:'./login'
    },
    {
      path:'/login',
      component:Login
    },
    {
      path:'/home',
      component:Home,
      redirect:'/welcome',
      children:[
        {
        path:'/welcome',
        component:Welcome
        },
        {
          path:'/users',
          component:Users
        },
        {
          path:'/rights',
          component:Rights
        },
        {
          path:'/roles',
          component:Roles
        },
        {
          path:'/categories',
          component:Cate
        },
        {
          path:'/params',
          component:Params
        },
        {
          path:'/goods',
          component:GoodsList
        },
        {
          path:'/goods/add',
          component:GoodsAdd
        },
        {
          path:'/orders',
          component:Order
        },
        {
          path:'/reports',
          component:Report
        },
      ]
    }
  ]
});
//挂载路由导航守卫
router.beforeEach((to,from,next) =>{
  //to将要访问的路径，from代表从那个路径跳转而来
  //next是一个函数表示放行，next()  next('/login)强制跳转
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})
export default router